Improvement in machine for boring hubs



@anni @Wina SELF -AND HERMAN KIRK, OF` SAME PLACE.

Letters Patent No. 102,625, dated May 3, 1870.

IMPROVEMENT IN MACHINE FOR BORING- HUBS.

The Schedule referred to in these Letters Patent and making pmt af the same To all whom 'it may concern:

Be it known that I, ABRAHAM TRoUP, of Lewisberry, in the county of York and State of Pennsylvania, have invented a new and Improved Hub-Boring and Box- Setting Machine; and I do hereby declare that the following is a full, clear, and exact description oi the same, reference being had to the accompanying drawings making a part of this specification, in whichl Figure l is a side elevation, and

Figure 2 is a transverse horizontal section.

This invention consists of a pair of-clamps for embracing the sides of a hub, provided with feet for resting on the top of the same, and combined with an instrument for boring a" recess in the end of the hub suitable to receive a box, in such manner that said' instrument may be accurately adjusted to the center of any hub.

' In the drawingsaa are concave convex clamps, attached crosswise of thev lower ends of arms b b, which are jointed at their upper extremities to the ends of a bow, c.

tl d are feet, attached crosswise of the arms b to their inner sides, at a suitable distance above the clamps a, which feet are intended to rest on the top of the hub while the clamps clasp its sides. Q

A is a cross-bar passingr through the arms b, and having exterior screw-threads and nuts, e e, furnished vcenter of vthe bow c and cross-bar A, and bearing a cutter, i, at its lower end,\by which, when the mandrel is put in revolution by any suitable machinery,

to eut a recess in the top ofthe hub for the'reception of the box.

On turning the nut e in the proper direction, the clamps may he set at equal distances from the mandrel, so as to center the latter upon the huh.

A gauge-nut, lo, furnished with a set-screw, is placed on the mandrel, and being set at a given distance above the how, shows, by coming in Contact with the latter, when the hox-recess'has been bored to the same depth.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

lhe combination of the bow c, mandrel B, cross.` bar A, nuts e, and arms b, provided with the clamps a, and feet d, all constructed and arranged to operate as described. y his v ABRAHAM -l- TROUP.

' mark.

Witnesses:

M. P. NnBINGEle LEWIS WIRE. 

